Which statement about sound is true?

Related Mcqs:

1. The echo (reflected sounD. will be distinctly heard only at ordinary temperatures if the distance of the reflecting surfaces from the source of sound is at least ________?

   A. 1120 ft B. 120 ft C. 56 ft D. 100 ft E. None of these...

2. Name the branch of science which deals with the study of sound and sound waves?

   A. Aeronautics B. Acoustics C. Aerostatics D. Aetiology Submitted by: ABDUL HAYEE...

3. Which from the following is true for “Sound”?

   A. Sound cannot travel through a vacuum B. Sound cannot travel through gases C. Sound cannot travel through liquids D. Sound cannot travel through solids...

4. Sound waves are _________ waves.

   A. Transverse B. Electromagnetic C. Longitudinal D. None of these...

5. speed of sound in dry air at 20 °C is___________?

   A. 353 m/s B. 345 m/s C. 343 m/s D. none of them Submitted by: ARIF HUSSAIN...

6. Sound travels in air at an average speed of nearly________ ?

   A. 1257 miles per hour B. 755 miles per hour C. 330 miles per hour D. None of these Submitted by: Rashid Mehmood...

7. When sound waves travel from air to water which of the following quantities remains unchanged?

   A. Speed B. Frequency C. Intensity D. Wavelength Submitted by: Rashid Mehmood...

8. Which of the following is used for hearing the sound of heart and lungs?

   A. Steroscope B. Stethoscope C. Oscillator D. Oncolator Submitted by: Farhan Rana...

9. Sound of frequency below 20 Hz is:___________?

   A. Audiosonic B. Infrasonic C. Ultrasonic D. Supersonic Submitted by: Fahad Mehsud...

10. Speed of sound in air is _______km/h?

    A. 1347 B. 243 C. 1235 D. 1495 Submitted by: Warraich...